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Full Discussion: Get previous and next line
Top Forums Shell Programming and Scripting Get previous and next line Post 302353287 by sunpraveen on Tuesday 15th of September 2009 04:23:17 AM
Old 09-15-2009
Try this:

INPUT FILE:
Code:
$ cat file.txt
NAME
ADDRESS
NO
NAME
OTHER
NEW
OP
NAME
FEW
OTHER
NEW
NAME


SHELL SCRIPT:
Code:
 
$ cat file1
grep -n "NAME" file.txt | cut -d ':' -f1 > /tmp/occurance_lines.txt
i=1
while read line
do
  if [[ ${i} -gt 3 ]]; then
    break
  fi
  line1=$(( ${line} - 1 ))
  if [[ line1 -ne 0 ]]; then
    tail +${line1} file.txt | head -1 >> /tmp/output.txt
  fi
  line2=$(( ${line} + 1 ))
  tail +${line2} file.txt | head -1 >> /tmp/output.txt
  i=$(( ${i} + 1 ))
done < /tmp/occurance_lines.txt
cat /tmp/output.txt
rm -f /tmp/occurance_lines.txt /tmp/output.txt

OUTPUT:
Code:
 
$ ./file1
ADDRESS
NO
OTHER
OP
FEW

HTH,Smilie


Regards,

Praveen
 

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LEARN ABOUT DEBIAN

xclip-copyfile

XCLIP-COPYFILE(1)					      General Commands Manual						 XCLIP-COPYFILE(1)

NAME

       xclip-copyfile, xclip-cutfile, xclip-pastefile - copy and move files via the X clipboard

SYNOPSIS

       xclip-copyfile [-p] FILES...

       xclip-cutfile [-p] FILES...

       xclip-pastefile

DESCRIPTION

       xclip-copyfile copies files into the X clipboard, recursing into directories.

       xclip-cutfile copies the files, but also deletes them afterwards.

       -p     preserve path formation

       xclip-pastefile pastes the files out of the clipboard

EXAMPLES

       Copying a file to a remote host

       [maggie.lkpg.cendio.se ~]$ echo "A file created on ${HOSTNAME}" > file1
       [maggie.lkpg.cendio.se ~]$ xclip-copyfile file1
       [sofie.homeip.net ~/doc]$ xclip-pastefile
       file1
       [sofie.homeip.net ~/doc]$ cat file1
       A file created on maggie.lkpg.cendio.se

       Copying an entire tree structure

       [sofie.homeip.net ~]$ xclip-copyfile doc
       [maggie.lkpg.cendio.se ~/tmp]$ xclip-pastefile
       doc/
       doc/letter-mom-april.txt
       doc/file1
       doc/letter-dad-march.txt

       Copying files with preserved path information

       [maggie.lkpg.cendio.se ~]$ xclip-copyfile -p /etc/sysconfig/grub
       tar: Removing leading `/' from member names
       [sofie.homeip.net ~/tmp]$ xclip-pastefile
       etc/sysconfig/grub
       [sofie.homeip.net ~/tmp]$ ls etc/sysconfig/grub
       etc/sysconfig/grub

       Moving files

       [sofie.homeip.net ~]$ ls letter-brother-may.txt
       letter-brother-may.txt
       [sofie.homeip.net ~]$ xclip-cutfile letter-brother-may.txt
       [sofie.homeip.net ~]$ ls letter-brother-may.txt
       ls: cannot access letter-brother-may.txt: No such file or directory
       [sofie.homeip.net ~]$ cd doc
       [sofie.homeip.net ~/doc]$ xclip-pastefile
       letter-brother-may.txt

AUTHORS

       This  manual  page  was written by Maximilian Gass <mxey@cloudconnected.org> for the Debian project. It may be used for everything else, of
       course.

																 XCLIP-COPYFILE(1)
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